[PD] audio > 1.0 not clipping?

[Rich E]

Yep, on a macbook.

Right, it sounded like there was a limiter in there, although I had
remembered in linux that any signal > |1.0| gets horrible
clipping artefacts.

Thanks for the explanation. Cheers,
Rich

On Mon, Sep 12, 2011 at 4:50 AM, chris clepper <cgclepper at gmail.com> wrote:

> When using the internal speakers on a Macbook a limiter is put into the
> CoreAudio chain.  A 3rd party hardware driver won't have this though.
>
> Since Rich says he can hear harmonics the sine wave is being clipped so
> things are working as expected.
>
>
>
> On Sun, Sep 11, 2011 at 1:57 AM, Miller Puckette <msp at ucsd.edu> wrote:
>
>> Hi all --
>>
>> I assume this is happening on a Macintosh -- on that platform, Pd sends
>> floating point straight to the Mac audio system.  Rumor has it that the
>> Mac might compress and/or equalize the signal on its way out, so who
>> knows what you're actually getting.  But anyway, (and probably contrary to
>> Pd's documentation) audio isn't automatically clipped on Pd's output on
>> Mac although it is on Linux and Windows whose audio systems are explicitly
>> fixed point (and probably not messed with by hte system).
>>
>> cheers
>> Miller
>>
>> On Sun, Sep 11, 2011 at 01:49:52AM -0400, Mathieu Bouchard wrote:
>> > On Sun, 11 Sep 2011, Rich E wrote:
>> >
>> > >Does anyone know why this doesn't clip?:
>> > >[osc~ 200]
>> > >|
>> > >[*~ 1.5]
>> > >|
>> > >[dac~]
>> > >
>> > >I'm trying this using pd 0.43 and the audio still sounds good
>> > >(although some extra harmonics can be heard), despite the phases
>> > >being in the range of [-1.5, 1.5]... ?
>> >
>> > No, you mean the amplitude is 1.5. You're not doing anything about
>> > the phase (and anyway, it's relative, so you can only hear phase
>> > difference, not phase).
>> >
>> > If you hear extra harmonics, then it has to be already clipping.
>> > What makes you think that it isn't ?
>> >
>> >  _______________________________________________________________________
>> > | Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal,
>> QC
>>
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